The pitch of the sound produced by the products during the first bites is significantly
correlated to the perceived crispness. A sharp sound produced during the
beginning of mastication appears as an important feature of a crispy cornflake.
The second canonical variable splits samples G and L from the others, whilst
accounting for 6.82% of the variation. These products are characterized by a
louder and longer sound emitted during the mastication of the products, only
when tested dry, since the attributes “loudness” and “duration” of sound do
not significantly discriminate the samples when evaluated on cereals mixed
with milk. For all other sensory attributes, there was no significant difference
along the first sensory dimension between scores for dry flakes and mixed
with milk. These results are in line with those of Gregson and Lee (2003),
who suggested that cornflakes keep a crispy texture after 3 min in milk. In
our case, the time before draining, i.e., 8 s, did not lead to texture modification,
which justifies carrying out the study of mechanical and acoustic properties
on dry products.